Rumble of Thunder

Boom. Boom. Boom

The sound of heavy footfalls reverberating through the house told Rumble that his older brother was home from the gym. He could hear him grumbling for the umpteenth time.

"Dammit, gotta get this doorway widened one of these days."

Said doorway was a good two feet across, but Thunderlane had to step through sideways and duck his head down to get his enormous body through it - and even then it was a squeeze, his slab-like pecs and obscene crotch bulge scraping against one side, and his perfectly rounded, firm glutes pushing against the other side.

He pushed his bulge in with his hands; it seemed to resist him almost instantaneously, swelling out obscenely and pushing his hands back again. Fighting the intense stimulation and pushing harder, he just about got his junk through, along with the rest of himself.

"Ah."

He exhaled and relaxed, his broad chest falling with his breath. Rolling his shoulders, he threw his backpack against the wall and stomped upstairs. He was home later than usual today, the diminishing light of late afternoon shining across the floor from the open windows.

"You home, little bro?"

"Uhuh!"

Rumble was laying on his stomach on his bed, only in boxer shorts, flicking through one of his brother's fitness magazines. In the past he might have rushed to get dressed before his brother came in but these days he didn't worry about that. He and his brother had gotten very close, perhaps - he thought to himself - in more ways than one.

So, he just stayed in his underwear, one lithe calf crossed over the other, his large and curvaceous behind unashamedly rising above his wide, flaring hips.

Despite being brothers, the two of them were virtually opposites physically. Thunderlane, his seven-foot body packed with brawn, shoulders wider than most doorways, biceps comparable to half-watermelons capping his thick, defined upper arms, was in complete contrast to his younger sibling.

Rumble was quite slender, 5'7 tall with faint muscle definition, but beneath the waist his body was decidedly feminine and very curvy. Expansive, curving hips two feet across supporting a decidedly rotund, verging-on-enormous derriere that extended a good six inches from his back, and thick, creamy thighs that curved gradually inward to his knees. As distinctly un-masculine as his body was, Rumble was fond of it. He wasn't exactly a macho stallion anyhow. And if his suspicions were correct, Thunderlane rather appreciated his physique as well. One thing they did have in common, though, was being well-endowed. Rumble's foot-long shaft was very impressive in its own right, but still looked small compared to his brother's three-foot monster that was as thick as Rumble's thigh when it was hard - and knowing his brother, that was most of the time.

It was one of Rumble's guilty pleasures to kneel by the bathroom door, ear against it, every morning when his brother was in the shower. Rumble thought it was adorable when Thunderlane tried to surreptitiously pleasure himself without his brother knowing, but his dick and his hands were so big that when he really got into it, the sound was unmistakable and quite impossible to cover up. This morning had been a particularly enjoyable audial session. Rumble listened intently as his brother whimpered and whined, restraining himself from crying out as he pumped his monolithic member with wild abandon. Then, as the climax came, he groaned through gritted teeth as thick ropes of cum splattered loudly against the tub, splashing against his feet and nearly blocking the drain. Rumble very nearly joined his brother in climaxing but as usual managed to hold himself together and disappear before his brother came out.

Rumble's daydream was interrupted by the floor shuddering as Thunderlane stomped up the stairs. He opened the door, ducked slightly, and sidled through, pulling off his t-shirt as he did so. Raising his head back up as he discarded the bundle of cloth, his eyes automatically locked on to Rumble's big behind, and the bulge in his gym shorts began to expand, snaking around inside his underwear and taking up every available inch of space. Much like Rumble considering covering up, Thunderlane would once have been deathly embarrassed of such an explicit and obvious show of arousal caused by his brother and would have done everything in his power to conceal it. But now? Eh, what the heck. Let's see where this goes.

"Hey, Rumble. Good read?"

Rumble rolled onto his back and sat up, propping himself up on the pillows.

"Hi. Yeah, you could say that."

Judging by the big hard-on Rumble was sporting, it sure was a good read. Packed to the brim with big, sweaty stallions working out, flexing and posing, it was right up Rumble's street. But as big and beefy as some of the mag's models were, they all paled in comparison to the demigod stood before him now.

"Jeez, Thunder. Why don't you give the editor a call or something? They'd stick you on the cover in a flash... no pun intended."

Thunderlane laughed heartily and sat on the bed next to his brother, who scooted across to make room for his bigger brother. Thunderlane swung his legs up and laid back, putting an arm around him and nuzzling the side of his face.

"Kinda you to say, but that ain't for me. Don't wanna be the centre of attention, there's only one stallion I want ogling me."

Rumble smirked and reached out with one arm, tracing a line with his finger up between his brother's big, rock-hard abs. He couldn't help but notice Thunder's bulge throb a little larger as he touched him.

"Well there's enough of you for the whole damn town to ogle, big guy."

"You're one to talk, bubble butt!"

"Oh, you did not go there! Yours isn't exactly petite either!"

"Been checking it out, huh? Can't blame ya for that."

They couldn't help but laugh at one another. It soon died down, and Thunderlane spoke again.

"Honestly though Rumble, I don't wanna sound weird but... you do have an amazing butt."

A rosy redness tickled Rumble's cheeks.

"Thank you, that's sweet of you to say. Yours is pretty damn impressive too."

It was Thunderlane's turn to blush. His butt was pretty darn big as well, even on his massive frame. Unlike his brother's though, there wasn't much jiggle - it was mostly muscle, but still had hint of softness to the touch. Jeez, just talking about his brother's body was really getting him going. Any minute now his gym shorts would start to tear from the immense pressure his immense package was exerting on them.

"Gah, the things you do to me!"

He stood up briskly and bent forward, inadvertently giving Rumble a first-class view of his prodigious rear packed into briefs as he shimmied his shorts down his musclebound legs. Slipping them over his feet, he stood up and looked down to see that his underwear wasn't faring much better. Did he dare?

He looked over his shoulder with his thumbs hooked into his briefs, locking eyes with his brother.

Rumble was sat up on the edge of the bed now, his hungry gaze was enough of an answer. Without thinking twice, he hiked his underwear down as well. Freed from its cloth prison, the comparatively cool air of the room felt pleasant for his warm, pulsating shaft. By now, it was rock-hard and nestling between his huge pecs, the head bobbing in front of his mouth. He'd sucked it himself plenty of times, and quite a few lucky mares (and a handful of stallions) had the privilege of doing the same. His brother? Nope. Not yet, anyway. He turned, his length swaying slightly and coming to rest a second or two after the rest of him.

And there he was; naked - and hard as steel - right in front of his brother.

"Sweet Celestia, you're perfect. So, you... gonna let me suck that thing?"

Thunderlane's cock replied with a lurch, a big glob of precum splurting out and splattering on Rumble's legs.

"I'll take that as a yes."